TY - RPRT TI - Helium soil-gas concentrations in the Torrington, Newcastle, Gillette (Wyoming), and Ekalaka (Montana) 1° x 2° quadrangles: data for a reconnaissance survey AU - G. Michael Reimer AU - D.G. Murrey AU - Josh M. Been PY - 1980 DO - 10.3133/ofr80452 UR - https://pubs.usgs.gov/publication/ofr80452 ID - ofr80452 ER -